cmd_display.c 1.7 KB

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  1. /*
  2. * (C) Copyright 2005
  3. * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  4. *
  5. * See file CREDITS for list of people who contributed to this
  6. * project.
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU General Public License as
  10. * published by the Free Software Foundation; either version 2 of
  11. * the License, or (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21. * MA 02111-1307 USA
  22. */
  23. #include <common.h>
  24. #include <command.h>
  25. #include <led-display.h>
  26. #undef DEBUG_DISP
  27. int do_display (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  28. {
  29. int i;
  30. /* Clear display */
  31. display_set(DISPLAY_CLEAR | DISPLAY_HOME);
  32. if (argc < 2)
  33. return (0);
  34. for (i = 1; i < argc; i++) {
  35. char *p = argv[i];
  36. if (i > 1) { /* Insert a space between strings */
  37. display_putc(' ');
  38. }
  39. while ((*p)) {
  40. #ifdef DEBUG_DISP
  41. putc(*p);
  42. #endif
  43. display_putc(*p++);
  44. }
  45. }
  46. #ifdef DEBUG_DISP
  47. putc('\n');
  48. #endif
  49. return (0);
  50. }
  51. /***************************************************/
  52. U_BOOT_CMD(
  53. display, CONFIG_SYS_MAXARGS, 1, do_display,
  54. "display string on dot matrix display",
  55. "[<string>]\n"
  56. " - with <string> argument: display <string> on dot matrix display\n"
  57. " - without arguments: clear dot matrix display"
  58. );